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Journal : Makara Journal of Science

THE NEW VARIANT OF THE SANDMEYER MODIFICATION REACTION BY IN-SITU GENERATED FORMALDEHYDE: SEMI-SYNTHESIS OF VANILLIN FROM GUAIACOL Suwarso, Wahyudi Priyono; Utama, Aris Eka
Makara Journal of Science Vol. 6, No. 2
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Abstract

REAKSI PENATAAN ULANG SIGMATROPIK HIDROGEN [1,3] SECARA TERMAL DAN REAKSI PENATAAN ULANG PROTOTROPIK [1,3] YANG DIKATALISIS OLEH KATALIS TRANSFER FASE (PTC) , [18]-CROWN ETHER-6: SEMI-SINTESIS VANILI DARI EUGENOL* Suwarso, Wahyudi Priyono; Sukri, Tony; Wijaya, Hendra
Makara Journal of Science Vol. 6, No. 1
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Abstract

Semi-synthesis of vanillin from eugenol can be divided into two step reactions namely, isomerization of eugenol into isoeugenol, and cleavage oxidation of isomerization product into expected reaction product (vanillin). In this work isomerization of eugenol or eugenyl acetate into isoeugenol or isoeugenyl acetate has been done via the following reactions: (1) Sigmatropic hydrogen (1,3) thermalic rearrangement reaction: direct heating of eugenol or eugenyl acetate at 220o C for 8 hours can produce 52.2% of isoeugenol or 65.7% of isoeugenyl acetate (both chemical yields are measured by means nmr-spectrometer), where products are viscose yellow-brownish liquid as mixture of unseparated starting material and isomerization product. (2) Prototropic (1,3) rearrangement catalyzed by phase transfer catalyst (PTC): (18)-crown ether-6 at room temperature can be afforded 71.4% of isoeugenol as light yellow liquid (mixture of unseparated starting material and isomerization product). Without any separation of mixture between isomerization product and starting material followed by subsequent cleavage oxidation using KMnO4 as oxidator in neutral condition catalyzed by phase transfer catalyst: (18)- crown ether-6 at room temperature for 3 hours can be yielded 16.5-22.9% of vanillin (from the starting material; eugenol or eugenyl acetate). The spectroscopical data of synthetical vanillin is not rather different with the spectroscopical data of authentical natural vanillin
SEMI SINTESIS VANILI DARI GUAIAKOL VIA REAKSI REIMER TIEMANN YANG DIKATALISIS DENGAN KATALIS TRANSFER FASE/PTC 18 CROWN ETHER 6 Suwarso, Wahyudi Priyono; Budianto, Emil; Jayadi, Inneke
Makara Journal of Science Vol. 6, No. 2
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Abstract

APLIKASI REAKSI KATALISIS HETEROGEN UNTUK PEMBUATAN VANILI SINTETIK (3-HIDROKSI-2-METOKSIBENZALDEHIDA) DARI EUGENOL (4-ALLIL-2-METOKSIFENOL) MINYAK CENGKEH Wibowo, Widajanti; Suwarso, Wahyudi Priyono; Utari, Triesye; Purwaningsih, Henny
Makara Journal of Science Vol. 6, No. 3
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Abstract

APLIKASI REAKSI KATALISIS HETEROGEN UNTUK PEMBUATAN VANILI SINTETIK (3-HIDROKSI-2-METOKSIBENZALDEHIDA) DARI EUGENOL (4-ALLIL-2-METOKSIFENOL) MINYAK CENGKEH Wibowo, Widajanti; Suwarso, Wahyudi Priyono; Utari, Triesye; Purwaningsih, Henny
Makara Journal of Science Vol. 6, No. 3
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Co-Authors Ade Zuhrotun Ahmad Muhtadi AKBAR ROZAAQ MUGNI Akhmad Sobarudin Amelia Soyata Andini, Alfita Nur Anis Khoerunisa Anis Khoerunisa, Anis Anisa Desy Ariyanti Antonius Herry Cahyana Ardiansah, Bayu Badriah Afriani Buchari - Chandra, Felix Christina Damayanti Danni Ramdhani Driyanti Rahayu Ellin Febrina Emil Budianto Emil Budianto Fenadya Rahayu Agustriono Fikri Nazaruddin Firdha Senja Maelaningsih GHALIB SYUKRILLAH SYAHPUTRA Gia A. Faradiba Hendra Wijaya Henny Purwaningsih Henry Ng Henry Ibrahim Dalli Ida Ayumiati Ida Musfiroh Ida Musfiroh Ida Musfiroh Ida Musfiroh, Ida Ike Susanti Ike Susanti Jayadi, Inneke Karen Low Ka Ling Kelvin F. Pratama Laffyanto, Dionisius Luki Yogaswara Yusuf Luluk Luqyana Zahrah Taqiudina Mahdiyah Maryam Nur Afifah Maryana, Rianti Mawaddah, Nadiya Widda Meilia Suherman Meilia Suherman, Meilia Melisa Intan Barliana Merly, Siti Michelle Ferdinand Muchtaridi Muchtaridi Muhammad Fauzi Muhammad Rizki Nugraha Mulyadi, Ananda Putri Aulia Mutakin Mutakin Mutakin Mutakin Mutakin Mutakin Nadia Fauziah Rahmadiani Nasrul Wathoni Noer Erin Meilina Nur hayati Nurike Susendi Nyi Mekar Saptarini Priska Primandini Priskila O Dwiestri Priskila O Dwiestri, Priskila O Putri Nur Azizah, Putri Nur Rahmah, Raisya Rahmana Emran Kartasasmita Rembulan Kusmawati Rembulan Kusmawati, Rembulan Rieda Nurwulan Septyani Rimadani Pratiwi Rr. Sulistiyaningsih Shelvy Elizabeth Suherman Slamet Ibrahim - Soni, Dang Sri Adi Sumiwi Sri Agung Fitri Kusuma Sri Agung Fitri Kusuma, Sri Agung Sriwidodo B Sriwidodo B, Sriwidodo Sriwidodo Sriwidodo Sriwidodo Sriwidodo Sriwidodo Sriwidodo, Sriwidodo Sudirman Sudirman Sukri, Tony Taofik Rusdiana Utama, Aris Eka Utari, Triesye VANIA PUTRI Widajanti Wibowo Wisnu A. A Wiwiek Indriyati Wiwiek Indriyati, Wiwiek Yoga Windhu Wardhana Yoppi Iskandar